RecentChanges displays the username of the last user that modified each page.  If the user is anonymous then it is not displayed.

!|Save Page Requester|
|uri   |username|password|save contents|
|UserPage|Aladdin|open sesame|user|
|NonUserPage|null|null|anonymous|

!|Response Requester|
|uri|status!|contents?|
|RecentChanges|200||

!|Response Examiner|
|type  |pattern|matches!|contents?|
|contents|Aladdin|yes||

!|Response Examiner|
|type  |pattern|matches!|
|contents|Anonymous|no|
